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28 lines
1.2 KiB
SQL
28 lines
1.2 KiB
SQL
drop table if exists test_update_idb;
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drop table if exists test_update2_idb;
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create table test_update_idb (a int(11) default null, d date default null , s varchar(20) default null) engine=infinidb;
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insert into test_update_idb values (1, '2013-02-21', 'first');
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insert into test_update_idb values (2, '2013-02-21', 'second');
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select * from test_update_idb;
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create table test_update2_idb(a int, d date, s varchar(20)) engine=infinidb;
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insert into test_update2_idb values (0, '2010-01-05', NULL);
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insert into test_update2_idb values (0, '2010-03-05', NULL);
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insert into test_update2_idb values (1, '2010-02-05', NULL);
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select * from test_update2_idb;
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update test_update_idb set d = (select max(d) from test_update2_idb where test_update_idb.a = test_update2_idb.a) where a=1;
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select * from test_update_idb;
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select max(d) into @x from test_update2_idb;
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update test_update_idb set d=@x;
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select * from test_update_idb;
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insert into test_update2_idb values (0, '2010-04-05', NULL);
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update test_update_idb a set a.d = (select max(b.d) from test_update2_idb b) where a.a=1;
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select * from test_update_idb;
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drop table if exists test_update_idb;
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drop table if exists test_update2_idb;
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